Document Outline

• OMM-0065_0B_HE-111_U-Tube_H-09-430 and UP_01_Cov_03-06-13
  • Telephone Support
  • Direct to AERCO Technical Support
• OMM-0065_0B_HE-111_U-Tube_H-09-430 and UP_02_CH1_03-06-13
  • CHAPTER 1 GENERAL INFORMATION
    • 1.1 introduction
    • 1.2 mechanical overview
    • 1.3 electronic control system
    • 1.4 options and accessories
      • 1.4.1 MODBUS Communication Option
      • 1.4.2 Accessories
• OMM-0065_0B_HE-111_U-Tube_H-09-430 and UP_03_CH2_03-06-13
  • CHAPTER 2 INSTALLATION
    • 2.1 introduction
    • 2.2 receiving, unpacking and installing
    • 2.3 Making the piping connections
    • 2.4 Installing the CXT-E Electronic Control System
      • 2.4.1 Accessing the Control Box Interior
      • 2.4.2 Connecting AC Power to the Control Box
      • 2.4.3 Wiring the CXT-E Actuator
      • 2.4.4 Verifying Pre-wired Connections
      • 2.4.5 Wiring the Temperature Controller to the MODBUS Control System
      • 2.4.6 Control System Programming Information
• OMM-0065_0B_HE-111_U-Tube_H-09-430 and UP_04_CH3_03-06-13
  • CHAPTER 3 FUNCTIONAL DESCRIPTION
    • 3.1 introduction
    • 3.2 MECHANICAL Description
      • 3.2.1 Overview
      • 3.2.2 Double-Wall Heat Transfer and Water Leakage
      • 3.2.3 Principal Mechanical Components
        • 3.2.3.1 Shell and Heads
        • 3.2.3.2 Double-Wall U-Tube Bundle and Tubesheets
        • 3.2.3.3 Recirculation Pipe and Pump
        • 3.2.3.4 CXT-E Control Valve
    • 3.3 Electronic Control System
      • 3.3.1 ECS Block Diagram
      • 3.3.2 ECS Operational Summary
      • 3.3.3 Over-temperature Condition
      • 3.3.4 Principal ECS Components
        • 3.3.4.1 Control Box Assembly
        • 3.3.4.2 DHW Outlet Dual Temperature Sensor
        • 3.3.4.3 Feed-Forward Mixture Temperature Sensor
        • 3.3.4.4 Over-temperature Solenoid Valve
        • 3.3.4.5 Electronic CXT-E Control Valve Actuator
• OMM-0065_0B_HE-111_U-Tube_H-09-430 and UP_05_CH4_03-06-13
  • CHAPTER 4 ADJUSTMENT
    • 4.1 introduction
    • 4.2 ADJUSTing the Electronic cxt-e actuator
    • 4.3 ADJUSTing the ELECTRONIC CONTROL SYSTEM
      • 4.3.1 Adjusting the Setpoint Temperature
      • 4.3.2 Adjusting the Over-Temperature Alarm Limit
• OMM-0065_0B_HE-111_U-Tube_H-09-430 and UP_06_CH5_03-06-13
  • CHAPTER 5 OPERATION
    • 5.1 introduction
    • 5.2 PRE-OPERATIONAL
    • 5.3 startup procedures
    • 5.4 shutting down and draining the heat exchanger
• OMM-0065_0B_HE-111_U-Tube_H-09-430 and UP_07_CH6_03-06-13
  • CHAPTER 6 SCHEDULED MAINTENANCE
    • 6.1 introduction
    • 6.2 Weekly maintenance
    • 6.3 monthly maintenance
    • 6.4 quarterly maintenance
      • 6.4.1 First Three Months
      • 6.4.2 Each Quarter
    • 6.5 Semi-Annual maintenance
    • 6.6 annual maintenance
• OMM-0065_0B_HE-111_U-Tube_H-09-430 and UP_08_CH7_03-06-13
  • CHAPTER 7 TROUBLESHOOTING
    • 7.1 introduction
      • 1. ELECTRONIC CONTROL VALVE, CXT-E
      • 2. ELECTRONIC CONTROL SYSTEM
    • 7.2 TROUBLESHOOTING procedures
      • 1. Refer to the FAULT INDICATION column in the following tables and locate the fault that best describes the existing conditions.
      • 2. Proceed to the PROBABLE CAUSE column. If more than one item is listed, start with the first item shown for the fault condition.
      • 3. Perform the corresponding checks and procedures listed in the CORRECTIVE ACTION column for the first PROBABLE CAUSE.
      • 4. Continue checking each additional PROBABLE CAUSE for the existing fault until the fault has been corrected.
      • 5. If component removal and/or replacement is required, refer to the applicable procedures in Chapter 8 Corrective Maintenance.
• OMM-0065_0B_HE-111_U-Tube_H-09-430 and UP_09_CH8_03-06-13
  • CHAPTER 8 CORRECTIVE MAINTENANCE
    • 8.1 introduction
    • 8.2 cxt-e ELECTRONIC CONTROL valve
      • 8.2.1 Valve Shaft Seal Retainer Replacement
      • 8.2.2 Valve Disassembly
      • 8.2.3 Valve Reassembly
      • 8.2.4 Actuator Replacement
      • 8.2.5 Linkage Assembly Replacement
      • 8.2.6 Recirculation Pump Replacement
    • 8.3 Electronic Control System
      • 8.3.1 Replacing the Control Box Assembly
      • 8.3.2 Replacing the Temperature Controller
      • 8.3.3 Replacing the Over-temperature Switch
      • 8.3.4 Replacing the DC Power Supply
      • 8.3.5 Replacing the DC Voltage Regulator
    • 8.4 Recommended Spare Parts
• OMM-0065_0B_HE-111_U-Tube_H-09-430 and UP_10_CH9_03-06-13
  • CHAPTER 9 DISASSEMBLY and reassembly
    • 9.1 introduction
      • 9.1.1 Tools required
    • 9.2 CHECKing FOR A TUBING LEAK
    • 9.3 REMOVing THE HEAT EXCHANGER SHELL
    • 9.4 reassembling the heat exchanger
• OMM-0065_0B_HE-111_U-Tube_H-09-430 and UP_11_AP-A_03-06-13
  • A.1 Temperature Controller procedures
    • A.1.1 Adding a Communication Board to the Temperature Controller
      • A.1.1.1 Parts Needed
      • A.1.1.2 Procedure for Adding the Communication Board
    • A.1.2 Changing the Temperature Controller Communication Addresses
  • A.2 MODBUS COMMUNICATION INFORMATION
  • A.3 Process and Diagnostic Alarms
    • A.3.1 Process Alarms
    • A.3.2 Diagnostic Alarms
    • A.3.3 Clearing the Hardware Error Display
• OMM-0065_0B_HE-111_U-Tube_H-09-430 and UP_12_AP-B_03-06-13
• OMM-0065_0B_HE-111_U-Tube_H-09-430 and UP_13_AP-C_03-06-13
• OMM-0065_0B_HE-111_U-Tube_H-09-430 and UP_14_WAR_03-06-13